### Function Macro

# GLib GNUC_ALLOC_SIZE

since: 2.18

#### Declaration [src]

    #define G_GNUC_ALLOC_SIZE (
      x
    )

#### Description [src]

Expands to the GNU C `alloc_size` function attribute if the compiler is a new enough gcc. This attribute tells the compiler that the function returns a pointer to memory of a size that is specified by the `xth` function parameter.

Place the attribute after the function declaration, just before the semicolon.

    gpointer g_malloc (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);

See the GNU C documentation for more details.

Available since: 2.18

This function is not directly available to language bindings.

#### Parameters

`x`

  Type: `-`

  The index of the argument specifying the allocation size.